<?php
    /**
     * Created by PhpStorm.
     * User: mybook-lhp
     * Date: 18/10/1
     * Time: 下午2:18
     */


    /**
     * File: Browser.php
     * Author: Chris Schuld (http://chrisschuld.com/)
     * http://chrisschuld.com/projects/browser-php-detecting-a-users-browser-from-php/
     * Last Modified: August 20th, 2010
     *
     * @version 1.9
     * @package PegasusPHP
     *
     * Copyright (C) 2008-2010 Chris Schuld  (chris@chrisschuld.com)
     *
     * This program is free software; you can redistribute it and/or
     * modify it under the terms of the GNU General Public License as
     * published by the Free Software Foundation; either version 2 of
     * the License, or (at your option) any later version.
     *
     * This program is distributed in the hope that it will be useful,
     * but WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     * GNU General Public License for more details at:
     * http://www.gnu.org/copyleft/gpl.html
     *
     *
     * Typical Usage:
     *
     *   $browser = new Browser();
     *   if( $browser->getBrowser() == Browser::BROWSER_FIREFOX && $browser->getVersion() >= 2 ) {
     *    echo 'You have FireFox version 2 or greater';
     *   }
     *
     * User Agents Sampled from: http://www.useragentstring.com/
     *
     * This implementation is based on the original work from Gary White
     * http://apptools.com/phptools/browser/
     *
     * UPDATES:
     *
     * 2010-08-20 (v1.9):
     *  + Added MSN Explorer Browser (legacy)
     *  + Added Bing/MSN Robot (Thanks Rob MacDonald)
     *  + Added the Android Platform (PLATFORM_ANDROID)
     *  + Fixed issue with Android 1.6/2.2 (Thanks Tom Hirashima)
     *
     * 2010-04-27 (v1.8):
     *  + Added iPad Support
     *
     * 2010-03-07 (v1.7):
     *  + *MAJOR* Rebuild (preg_match and other "slow" routine removal(s))
     *  + Almost allof Gary's original code has been replaced
     *  + Large PHPUNIT testing environment created to validate new releases and additions
     *  + Added FreeBSD Platform
     *  + Added OpenBSD Platform
     *  + Added NetBSD Platform
     *  + Added SunOS Platform
     *  + Added OpenSolaris Platform
     *  + Added support of the Iceweazel Browser
     *  + Added isChromeFrame() call to check if chromeframe is in use
     *  + Moved the Opera check in front of the Firefox check due to legacy Opera User Agents
     *  + Added the __toString() method (Thanks Deano)
     *
     * 2009-11-15:
     *  + Updated the checkes for Firefox
     *  + Added the NOKIA platform
     *  + Added Checks for the NOKIA brower(s)
     *
     * 2009-11-08:
     *  + PHP 5.3 Support
     *  + Added support for BlackBerry OS and BlackBerry browser
     *  + Added support for the Opera Mini browser
     *  + Added additional documenation
     *  + Added support for isRobot() and isMobile()
     *  + Added support for Opera version 10
     *  + Added support for deprecated Netscape Navigator version 9
     *  + Added support for IceCat
     *  + Added support for Shiretoko
     *
     * 2010-04-27 (v1.8):
     *  + Added iPad Support
     *
     * 2009-08-18:
     *  + Updated to support PHP 5.3 - removed all deprecated function calls
     *  + Updated to remove all double quotes (") -- converted to single quotes (')
     *
     * 2009-04-27:
     *  + Updated the IE check to remove a typo and bug (thanks John)
     *
     * 2009-04-22:
     *  + Added detection for GoogleBot
     *  + Added detection for the W3C Validator.
     *  + Added detection for Yahoo! Slurp
     *
     * 2009-03-14:
     *  + Added detection for iPods.
     *  + Added Platform detection for iPhones
     *  + Added Platform detection for iPods
     *
     * 2009-02-16: (Rick Hale)
     *  + Added version detection for Android phones.
     *
     * 2008-12-09:
     *  + Removed unused constant
     *
     * 2008-11-07:
     *  + Added Google's Chrome to the detection list
     *  + Added isBrowser(string) to the list of functions special thanks to
     *Daniel 'mavrick' Lang for the function concept (http://mavrick.id.au)
     *
     *
     * Gary White noted: "Since browser detection is so unreliable, I am
     * no longer maintaining this script. You are free to use and or
     * modify/update it as you want, however the author assumes no
     * responsibility for the accuracy of the detected values."
     *
     * Anyone experienced with Gary's script might be interested in these notes:
     *
     *   Added class constants
     *   Added detection and version detection for Google's Chrome
     *   Updated the version detection for Amaya
     *   Updated the version detection for Firefox
     *   Updated the version detection for Lynx
     *   Updated the version detection for WebTV
     *   Updated the version detection for NetPositive
     *   Updated the version detection for IE
     *   Updated the version detection for OmniWeb
     *   Updated the version detection for iCab
     *   Updated the version detection for Safari
     *   Updated Safari to remove mobile devices (iPhone)
     *   Added detection for iPhone
     *   Added detection for robots
     *   Added detection for mobile devices
     *   Added detection for BlackBerry
     *   Removed Netscape checks (matches heavily with firefox & mozilla)
     *
     */

    namespace app\common\utils;


    class UtilBrowser
    {

        private $_agent = '';

        private $_browser_name = '';

        private $_version = '';

        private $_platform = '';

        private $_os = '';

        private $_is_aol = false;

        private $_is_mobile = false;

        private $_is_robot = false;

        private $_aol_version = '';

        const BROWSER_UNKNOWN = 'unknown';
        const VERSION_UNKNOWN = 'unknown';

        const BROWSER_OPERA        = 'Opera';// http://www.opera.com/
        const BROWSER_OPERA_MINI   = 'Opera Mini';  // http://www.opera.com/mini/
        const BROWSER_WEBTV        = 'WebTV';// http://www.webtv.net/pc/
        const BROWSER_IE           = 'Internet Explorer';   // http://www.microsoft.com/ie/
        const BROWSER_POCKET_IE    = 'Pocket Internet Explorer'; // http://en.wikipedia.org/wiki/Internet_Explorer_Mobile
        const BROWSER_KONQUEROR    = 'Konqueror';// http://www.konqueror.org/
        const BROWSER_ICAB         = 'iCab';  // http://www.icab.de/
        const BROWSER_OMNIWEB      = 'OmniWeb';// http://www.omnigroup.com/applications/omniweb/
        const BROWSER_FIREBIRD     = 'Firebird';  // http://www.ibphoenix.com/
        const BROWSER_FIREFOX      = 'Firefox';// http://www.mozilla.com/en-US/firefox/firefox.html
        const BROWSER_ICEWEASEL    = 'Iceweasel';// http://www.geticeweasel.org/
        const BROWSER_SHIRETOKO    = 'Shiretoko';// http://wiki.mozilla.org/Projects/shiretoko
        const BROWSER_MOZILLA      = 'Mozilla';// http://www.mozilla.com/en-US/
        const BROWSER_AMAYA        = 'Amaya';// http://www.w3.org/Amaya/
        const BROWSER_LYNX         = 'Lynx';  // http://en.wikipedia.org/wiki/Lynx
        const BROWSER_SAFARI       = 'Safari';  // http://apple.com
        const BROWSER_IPHONE       = 'iPhone';  // http://apple.com
        const BROWSER_IPOD         = 'iPod';  // http://apple.com
        const BROWSER_IPAD         = 'iPad';  // http://apple.com
        const BROWSER_CHROME       = 'Chrome';  // http://www.google.com/chrome
        const BROWSER_ANDROID      = 'Android';// http://www.android.com/
        const BROWSER_GOOGLEBOT    = 'GoogleBot';// http://en.wikipedia.org/wiki/Googlebot
        const BROWSER_SLURP        = 'Yahoo! Slurp'; // http://en.wikipedia.org/wiki/Yahoo!_Slurp
        const BROWSER_W3CVALIDATOR = 'W3C Validator'; // http://validator.w3.org/
        const BROWSER_BLACKBERRY   = 'BlackBerry';  // http://www.blackberry.com/
        const BROWSER_ICECAT       = 'IceCat';  // http://en.wikipedia.org/wiki/GNU_IceCat
        const BROWSER_NOKIA_S60    = 'Nokia S60 OSS Browser';// http://en.wikipedia.org/wiki/Web_Browser_for_S60
        const BROWSER_NOKIA        = 'Nokia Browser';// * all other WAP-based browsers on the Nokia Platform
        const BROWSER_MSN          = 'MSN Browser';// http://explorer.msn.com/
        const BROWSER_MSNBOT       = 'MSN Bot'; // http://search.msn.com/msnbot.htm
        // http://en.wikipedia.org/wiki/Msnbot  (used for Bing as well)

        const BROWSER_NETSCAPE_NAVIGATOR = 'Netscape Navigator';  // http://browser.netscape.com/ (DEPRECATED)
        const BROWSER_GALEON             = 'Galeon';  // http://galeon.sourceforge.net/ (DEPRECATED)
        const BROWSER_NETPOSITIVE        = 'NetPositive';// http://en.wikipedia.org/wiki/NetPositive (DEPRECATED)
        const BROWSER_PHOENIX            = 'Phoenix';// http://en.wikipedia.org/wiki/History_of_Mozilla_Firefox (DEPRECATED)

        const PLATFORM_UNKNOWN     = 'unknown';
        const PLATFORM_WINDOWS     = 'Windows';
        const PLATFORM_WINDOWS_CE  = 'Windows CE';
        const PLATFORM_APPLE       = 'Apple';
        const PLATFORM_LINUX       = 'Linux';
        const PLATFORM_OS2         = 'OS/2';
        const PLATFORM_BEOS        = 'BeOS';
        const PLATFORM_IPHONE      = 'iPhone';
        const PLATFORM_IPOD        = 'iPod';
        const PLATFORM_IPAD        = 'iPad';
        const PLATFORM_BLACKBERRY  = 'BlackBerry';
        const PLATFORM_NOKIA       = 'Nokia';
        const PLATFORM_FREEBSD     = 'FreeBSD';
        const PLATFORM_OPENBSD     = 'OpenBSD';
        const PLATFORM_NETBSD      = 'NetBSD';
        const PLATFORM_SUNOS       = 'SunOS';
        const PLATFORM_OPENSOLARIS = 'OpenSolaris';
        const PLATFORM_ANDROID     = 'Android';

        const OPERATING_SYSTEM_UNKNOWN = 'unknown';

        public function Browser($useragent = "")
        {

            $this->reset();
            if ($useragent != "")
            {
                $this->setUserAgent($useragent);
            }
            else
            {
                $this->determine();
            }
        }

        /**
         * Reset all properties
         */
        public function reset()
        {

            $this->_agent        = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : "";
            $this->_browser_name = self::BROWSER_UNKNOWN;
            $this->_version      = self::VERSION_UNKNOWN;
            $this->_platform     = self::PLATFORM_UNKNOWN;
            $this->_os           = self::OPERATING_SYSTEM_UNKNOWN;
            $this->_is_aol       = false;
            $this->_is_mobile    = false;
            $this->_is_robot     = false;
            $this->_aol_version  = self::VERSION_UNKNOWN;
        }

        /**
         * Check to see if the specific browser is valid
         *
         * @param string $browserName
         *
         * @return True if the browser is the specified browser
         */
        function isBrowser($browserName)
        {

            return (0 == strcasecmp($this->_browser_name,trim($browserName)));
        }

        /**
         * The name of the browser.  All return types are from the class contants
         *
         * @return string Name of the browser
         */
        public function getBrowser()
        {

            return $this->_browser_name;
        }

        /**
         * Set the name of the browser
         *
         * @param $browser The name of the Browser
         */
        public function setBrowser($browser)
        {

            return $this->_browser_name = $browser;
        }

        /**
         * The name of the platform.  All return types are from the class contants
         *
         * @return string Name of the browser
         */
        public function getPlatform()
        {

            return $this->_platform;
        }

        /**
         * Set the name of the platform
         *
         * @param $platform The name of the Platform
         */
        public function setPlatform($platform)
        {

            return $this->_platform = $platform;
        }

        /**
         * The version of the browser.
         *
         * @return string Version of the browser (will only contain alpha-numeric characters and a period)
         */
        public function getVersion()
        {

            return $this->_version;
        }

        /**
         * Set the version of the browser
         *
         * @param $version The version of the Browser
         */
        public function setVersion($version)
        {

            $this->_version = preg_replace('/[^0-9,.,a-z,A-Z-]/','',$version);
        }

        /**
         * The version of AOL.
         *
         * @return string Version of AOL (will only contain alpha-numeric characters and a period)
         */
        public function getAolVersion()
        {

            return $this->_aol_version;
        }

        /**
         * Set the version of AOL
         *
         * @param $version The version of AOL
         */
        public function setAolVersion($version)
        {

            $this->_aol_version = preg_replace('/[^0-9,.,a-z,A-Z]/','',$version);
        }

        /**
         * Is the browser from AOL?
         *
         * @return boolean True if the browser is from AOL otherwise false
         */
        public function isAol()
        {

            return $this->_is_aol;
        }

        /**
         * Is the browser from a mobile device?
         *
         * @return boolean True if the browser is from a mobile device otherwise false
         */
        public function isMobile()
        {

            return $this->_is_mobile;
        }

        /**
         * Is the browser from a robot (ex Slurp,GoogleBot)?
         *
         * @return boolean True if the browser is from a robot otherwise false
         */
        public function isRobot()
        {

            return $this->_is_robot;
        }

        /**
         * Set the browser to be from AOL
         *
         * @param $isAol
         */
        public function setAol($isAol)
        {

            $this->_is_aol = $isAol;
        }

        /**
         * Set the Browser to be mobile
         *
         * @param boolean $value is the browser a mobile brower or not
         */
        protected function setMobile($value = true)
        {

            $this->_is_mobile = $value;
        }

        /**
         * Set the Browser to be a robot
         *
         * @param boolean $value is the browser a robot or not
         */
        protected function setRobot($value = true)
        {

            $this->_is_robot = $value;
        }

        /**
         * Get the user agent value in use to determine the browser
         *
         * @return string The user agent from the HTTP header
         */
        public function getUserAgent()
        {

            return $this->_agent;
        }

        /**
         * Set the user agent value (the construction will use the HTTP header value - this will overwrite it)
         *
         * @param $agent_string The value for the User Agent
         */
        public function setUserAgent($agent_string)
        {

            $this->reset();
            $this->_agent = $agent_string;
            $this->determine();
        }

        /**
         * Used to determine if the browser is actually "chromeframe"
         *
         * @since 1.7
         * @return boolean True if the browser is using chromeframe
         */
        public function isChromeFrame()
        {

            return (strpos($this->_agent,"chromeframe") !== false);
        }

        /**
         * Returns a formatted string with a summary of the details of the browser.
         *
         * @return string formatted string with a summary of the browser
         */
        public function __toString()
        {

            return "<strong>Browser Name:</strong>{$this->getBrowser()}<br/>\n" . "<strong>Browser Version:</strong>{$this->getVersion()}<br/>\n" . "<strong>Browser User Agent String:</strong>{$this->getUserAgent()}<br/>\n" . "<strong>Platform:</strong>{$this->getPlatform()}<br/>";
        }

        /**
         * Protected routine to calculate and determine what the browser is in use (including platform)
         */
        protected function determine()
        {

            $this->checkPlatform();
            $this->checkBrowsers();
            $this->checkForAol();
        }

        /**
         * Protected routine to determine the browser type
         *
         * @return boolean True if the browser was detected otherwise false
         */
        protected function checkBrowsers()
        {

            return (// well-known, well-used
                // Special Notes:
                // (1) Opera must be checked before FireFox due to the odd
                // user agents used in some older versions of Opera
                // (2) WebTV is strapped onto Internet Explorer so we must
                // check for WebTV before IE
                // (3) (deprecated) Galeon is based on Firefox and needs to be
                // tested before Firefox is tested
                // (4) OmniWeb is based on Safari so OmniWeb check must occur
                // before Safari
                // (5) Netscape 9+ is based on Firefox so Netscape checks
                // before FireFox are necessary
                $this->checkBrowserWebTv() || $this->checkBrowserInternetExplorer() || $this->checkBrowserOpera() || $this->checkBrowserGaleon() || $this->checkBrowserNetscapeNavigator9Plus() || $this->checkBrowserFirefox() || $this->checkBrowserChrome() || $this->checkBrowserOmniWeb() ||

                // common mobile
                $this->checkBrowserAndroid() || $this->checkBrowseriPad() || $this->checkBrowseriPod() || $this->checkBrowseriPhone() || $this->checkBrowserBlackBerry() || $this->checkBrowserNokia() ||

                // common bots
                $this->checkBrowserGoogleBot() || $this->checkBrowserMSNBot() || $this->checkBrowserSlurp() ||

                // WebKit base check (post mobile and others)
                $this->checkBrowserSafari() ||

                // everyone else
                $this->checkBrowserNetPositive() || $this->checkBrowserFirebird() || $this->checkBrowserKonqueror() || $this->checkBrowserIcab() || $this->checkBrowserPhoenix() || $this->checkBrowserAmaya() || $this->checkBrowserLynx() || $this->checkBrowserShiretoko() || $this->checkBrowserIceCat() || $this->checkBrowserW3CValidator() || $this->checkBrowserMozilla() /* Mozilla is such an open standard that you must check it last */);
        }

        /**
         * Determine if the user is using a BlackBerry (last updated 1.7)
         *
         * @return boolean True if the browser is the BlackBerry browser otherwise false
         */
        protected function checkBrowserBlackBerry()
        {

            if (stripos($this->_agent,'blackberry') !== false)
            {
                $aresult  = explode("/",stristr($this->_agent,"BlackBerry"));
                $aversion = explode(' ',$aresult[1]);
                $this->setVersion($aversion[0]);
                $this->_browser_name = self::BROWSER_BLACKBERRY;
                $this->setMobile(true);
                return true;
            }
            return false;
        }

        /**
         * Determine if the user is using an AOL User Agent (last updated 1.7)
         *
         * @return boolean True if the browser is from AOL otherwise false
         */
        protected function checkForAol()
        {

            $this->setAol(false);
            $this->setAolVersion(self::VERSION_UNKNOWN);

            if (stripos($this->_agent,'aol') !== false)
            {
                $aversion = explode(' ',stristr($this->_agent,'AOL'));
                $this->setAol(true);
                $this->setAolVersion(preg_replace('/[^0-9\.a-z]/i','',$aversion[1]));
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is the GoogleBot or not (last updated 1.7)
         *
         * @return boolean True if the browser is the GoogletBot otherwise false
         */
        protected function checkBrowserGoogleBot()
        {

            if (stripos($this->_agent,'googlebot') !== false)
            {
                $aresult  = explode('/',stristr($this->_agent,'googlebot'));
                $aversion = explode(' ',$aresult[1]);
                $this->setVersion(str_replace(';','',$aversion[0]));
                $this->_browser_name = self::BROWSER_GOOGLEBOT;
                $this->setRobot(true);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is the MSNBot or not (last updated 1.9)
         *
         * @return boolean True if the browser is the MSNBot otherwise false
         */
        protected function checkBrowserMSNBot()
        {

            if (stripos($this->_agent,"msnbot") !== false)
            {
                $aresult  = explode("/",stristr($this->_agent,"msnbot"));
                $aversion = explode(" ",$aresult[1]);
                $this->setVersion(str_replace(";","",$aversion[0]));
                $this->_browser_name = self::BROWSER_MSNBOT;
                $this->setRobot(true);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is the W3C Validator or not (last updated 1.7)
         *
         * @return boolean True if the browser is the W3C Validator otherwise false
         */
        protected function checkBrowserW3CValidator()
        {

            if (stripos($this->_agent,'W3C-checklink') !== false)
            {
                $aresult  = explode('/',stristr($this->_agent,'W3C-checklink'));
                $aversion = explode(' ',$aresult[1]);
                $this->setVersion($aversion[0]);
                $this->_browser_name = self::BROWSER_W3CVALIDATOR;
                return true;
            }
            else if (stripos($this->_agent,'W3C_Validator') !== false)
            {
                // Some of the Validator versions do not delineate w/ a slash - add it back in
                $ua       = str_replace("W3C_Validator ","W3C_Validator/",$this->_agent);
                $aresult  = explode('/',stristr($ua,'W3C_Validator'));
                $aversion = explode(' ',$aresult[1]);
                $this->setVersion($aversion[0]);
                $this->_browser_name = self::BROWSER_W3CVALIDATOR;
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is the Yahoo! Slurp Robot or not (last updated 1.7)
         *
         * @return boolean True if the browser is the Yahoo! Slurp Robot otherwise false
         */
        protected function checkBrowserSlurp()
        {

            if (stripos($this->_agent,'slurp') !== false)
            {
                $aresult  = explode('/',stristr($this->_agent,'Slurp'));
                $aversion = explode(' ',$aresult[1]);
                $this->setVersion($aversion[0]);
                $this->_browser_name = self::BROWSER_SLURP;
                $this->setRobot(true);
                $this->setMobile(false);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Internet Explorer or not (last updated 1.7)
         *
         * @return boolean True if the browser is Internet Explorer otherwise false
         */
        protected function checkBrowserInternetExplorer()
        {

            // Test for v1 - v1.5 IE
            if (stripos($this->_agent,'microsoft internet explorer') !== false)
            {
                $this->setBrowser(self::BROWSER_IE);
                $this->setVersion('1.0');
                $aresult = stristr($this->_agent,'/');
                if (preg_match('/308|425|426|474|0b1/i',$aresult))
                {
                    $this->setVersion('1.5');
                }
                return true;
            }
            // Test for versions > 1.5
            else if (stripos($this->_agent,'msie') !== false && stripos($this->_agent,'opera') === false)
            {
                // See if the browser is the odd MSN Explorer
                if (stripos($this->_agent,'msnb') !== false)
                {
                    $aresult = explode(' ',stristr(str_replace(';','; ',$this->_agent),'MSN'));
                    $this->setBrowser(self::BROWSER_MSN);
                    $this->setVersion(str_replace(['(',')',';'],'',$aresult[1]));
                    return true;
                }
                $aresult = explode(' ',stristr(str_replace(';','; ',$this->_agent),'msie'));
                $this->setBrowser(self::BROWSER_IE);
                $this->setVersion(str_replace(['(',')',';'],'',$aresult[1]));
                return true;
            }
            // Test for Pocket IE
            else if (stripos($this->_agent,'mspie') !== false || stripos($this->_agent,'pocket') !== false)
            {
                $aresult = explode(' ',stristr($this->_agent,'mspie'));
                $this->setPlatform(self::PLATFORM_WINDOWS_CE);
                $this->setBrowser(self::BROWSER_POCKET_IE);
                $this->setMobile(true);

                if (stripos($this->_agent,'mspie') !== false)
                {
                    $this->setVersion($aresult[1]);
                }
                else
                {
                    $aversion = explode('/',$this->_agent);
                    $this->setVersion($aversion[1]);
                }
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Opera or not (last updated 1.7)
         *
         * @return boolean True if the browser is Opera otherwise false
         */
        protected function checkBrowserOpera()
        {

            if (stripos($this->_agent,'opera mini') !== false)
            {
                $resultant = stristr($this->_agent,'opera mini');
                if (preg_match('/\//',$resultant))
                {
                    $aresult  = explode('/',$resultant);
                    $aversion = explode(' ',$aresult[1]);
                    $this->setVersion($aversion[0]);
                }
                else
                {
                    $aversion = explode(' ',stristr($resultant,'opera mini'));
                    $this->setVersion($aversion[1]);
                }
                $this->_browser_name = self::BROWSER_OPERA_MINI;
                $this->setMobile(true);
                return true;
            }
            else if (stripos($this->_agent,'opera') !== false)
            {
                $resultant = stristr($this->_agent,'opera');
                if (preg_match('/Version\/(10.*)$/',$resultant,$matches))
                {
                    $this->setVersion($matches[1]);
                }
                else if (preg_match('/\//',$resultant))
                {
                    $aresult  = explode('/',str_replace("("," ",$resultant));
                    $aversion = explode(' ',$aresult[1]);
                    $this->setVersion($aversion[0]);
                }
                else
                {
                    $aversion = explode(' ',stristr($resultant,'opera'));
                    $this->setVersion(isset($aversion[1]) ? $aversion[1] : "");
                }
                $this->_browser_name = self::BROWSER_OPERA;
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Chrome or not (last updated 1.7)
         *
         * @return boolean True if the browser is Chrome otherwise false
         */
        protected function checkBrowserChrome()
        {

            if (stripos($this->_agent,'Chrome') !== false)
            {
                $aresult  = explode('/',stristr($this->_agent,'Chrome'));
                $aversion = explode(' ',$aresult[1]);
                $this->setVersion($aversion[0]);
                $this->setBrowser(self::BROWSER_CHROME);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is WebTv or not (last updated 1.7)
         *
         * @return boolean True if the browser is WebTv otherwise false
         */
        protected function checkBrowserWebTv()
        {

            if (stripos($this->_agent,'webtv') !== false)
            {
                $aresult  = explode('/',stristr($this->_agent,'webtv'));
                $aversion = explode(' ',$aresult[1]);
                $this->setVersion($aversion[0]);
                $this->setBrowser(self::BROWSER_WEBTV);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is NetPositive or not (last updated 1.7)
         *
         * @return boolean True if the browser is NetPositive otherwise false
         */
        protected function checkBrowserNetPositive()
        {

            if (stripos($this->_agent,'NetPositive') !== false)
            {
                $aresult  = explode('/',stristr($this->_agent,'NetPositive'));
                $aversion = explode(' ',$aresult[1]);
                $this->setVersion(str_replace(['(',')',';'],'',$aversion[0]));
                $this->setBrowser(self::BROWSER_NETPOSITIVE);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Galeon or not (last updated 1.7)
         *
         * @return boolean True if the browser is Galeon otherwise false
         */
        protected function checkBrowserGaleon()
        {

            if (stripos($this->_agent,'galeon') !== false)
            {
                $aresult  = explode(' ',stristr($this->_agent,'galeon'));
                $aversion = explode('/',$aresult[0]);
                $this->setVersion($aversion[1]);
                $this->setBrowser(self::BROWSER_GALEON);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Konqueror or not (last updated 1.7)
         *
         * @return boolean True if the browser is Konqueror otherwise false
         */
        protected function checkBrowserKonqueror()
        {

            if (stripos($this->_agent,'Konqueror') !== false)
            {
                $aresult  = explode(' ',stristr($this->_agent,'Konqueror'));
                $aversion = explode('/',$aresult[0]);
                $this->setVersion($aversion[1]);
                $this->setBrowser(self::BROWSER_KONQUEROR);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is iCab or not (last updated 1.7)
         *
         * @return boolean True if the browser is iCab otherwise false
         */
        protected function checkBrowserIcab()
        {

            if (stripos($this->_agent,'icab') !== false)
            {
                $aversion = explode(' ',stristr(str_replace('/',' ',$this->_agent),'icab'));
                $this->setVersion($aversion[1]);
                $this->setBrowser(self::BROWSER_ICAB);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is OmniWeb or not (last updated 1.7)
         *
         * @return boolean True if the browser is OmniWeb otherwise false
         */
        protected function checkBrowserOmniWeb()
        {

            if (stripos($this->_agent,'omniweb') !== false)
            {
                $aresult  = explode('/',stristr($this->_agent,'omniweb'));
                $aversion = explode(' ',isset($aresult[1]) ? $aresult[1] : "");
                $this->setVersion($aversion[0]);
                $this->setBrowser(self::BROWSER_OMNIWEB);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Phoenix or not (last updated 1.7)
         *
         * @return boolean True if the browser is Phoenix otherwise false
         */
        protected function checkBrowserPhoenix()
        {

            if (stripos($this->_agent,'Phoenix') !== false)
            {
                $aversion = explode('/',stristr($this->_agent,'Phoenix'));
                $this->setVersion($aversion[1]);
                $this->setBrowser(self::BROWSER_PHOENIX);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Firebird or not (last updated 1.7)
         *
         * @return boolean True if the browser is Firebird otherwise false
         */
        protected function checkBrowserFirebird()
        {

            if (stripos($this->_agent,'Firebird') !== false)
            {
                $aversion = explode('/',stristr($this->_agent,'Firebird'));
                $this->setVersion($aversion[1]);
                $this->setBrowser(self::BROWSER_FIREBIRD);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Netscape Navigator 9+ or not (last updated 1.7)
         * NOTE: (http://browser.netscape.com/ - Official support ended on March 1st, 2008)
         *
         * @return boolean True if the browser is Netscape Navigator 9+ otherwise false
         */
        protected function checkBrowserNetscapeNavigator9Plus()
        {

            if (stripos($this->_agent,'Firefox') !== false && preg_match('/Navigator\/([^ ]*)/i',$this->_agent,$matches))
            {
                $this->setVersion($matches[1]);
                $this->setBrowser(self::BROWSER_NETSCAPE_NAVIGATOR);
                return true;
            }
            else if (stripos($this->_agent,'Firefox') === false && preg_match('/Netscape6?\/([^ ]*)/i',$this->_agent,$matches))
            {
                $this->setVersion($matches[1]);
                $this->setBrowser(self::BROWSER_NETSCAPE_NAVIGATOR);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Shiretoko or not (https://wiki.mozilla.org/Projects/shiretoko) (last updated 1.7)
         *
         * @return boolean True if the browser is Shiretoko otherwise false
         */
        protected function checkBrowserShiretoko()
        {

            if (stripos($this->_agent,'Mozilla') !== false && preg_match('/Shiretoko\/([^ ]*)/i',$this->_agent,$matches))
            {
                $this->setVersion($matches[1]);
                $this->setBrowser(self::BROWSER_SHIRETOKO);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Ice Cat or not (http://en.wikipedia.org/wiki/GNU_IceCat) (last updated 1.7)
         *
         * @return boolean True if the browser is Ice Cat otherwise false
         */
        protected function checkBrowserIceCat()
        {

            if (stripos($this->_agent,'Mozilla') !== false && preg_match('/IceCat\/([^ ]*)/i',$this->_agent,$matches))
            {
                $this->setVersion($matches[1]);
                $this->setBrowser(self::BROWSER_ICECAT);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Nokia or not (last updated 1.7)
         *
         * @return boolean True if the browser is Nokia otherwise false
         */
        protected function checkBrowserNokia()
        {

            if (preg_match("/Nokia([^\/]+)\/([^ SP]+)/i",$this->_agent,$matches))
            {
                $this->setVersion($matches[2]);
                if (stripos($this->_agent,'Series60') !== false || strpos($this->_agent,'S60') !== false)
                {
                    $this->setBrowser(self::BROWSER_NOKIA_S60);
                }
                else
                {
                    $this->setBrowser(self::BROWSER_NOKIA);
                }
                $this->setMobile(true);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Firefox or not (last updated 1.7)
         *
         * @return boolean True if the browser is Firefox otherwise false
         */
        protected function checkBrowserFirefox()
        {

            if (stripos($this->_agent,'safari') === false)
            {
                if (preg_match("/Firefox[\/ \(]([^ ;\)]+)/i",$this->_agent,$matches))
                {
                    $this->setVersion($matches[1]);
                    $this->setBrowser(self::BROWSER_FIREFOX);
                    return true;
                }
                else if (preg_match("/Firefox$/i",$this->_agent,$matches))
                {
                    $this->setVersion("");
                    $this->setBrowser(self::BROWSER_FIREFOX);
                    return true;
                }
            }
            return false;
        }

        /**
         * Determine if the browser is Firefox or not (last updated 1.7)
         *
         * @return boolean True if the browser is Firefox otherwise false
         */
        protected function checkBrowserIceweasel()
        {

            if (stripos($this->_agent,'Iceweasel') !== false)
            {
                $aresult  = explode('/',stristr($this->_agent,'Iceweasel'));
                $aversion = explode(' ',$aresult[1]);
                $this->setVersion($aversion[0]);
                $this->setBrowser(self::BROWSER_ICEWEASEL);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Mozilla or not (last updated 1.7)
         *
         * @return boolean True if the browser is Mozilla otherwise false
         */
        protected function checkBrowserMozilla()
        {

            if (stripos($this->_agent,'mozilla') !== false && preg_match('/rv:[0-9].[0-9][a-b]?/i',$this->_agent) && stripos($this->_agent,'netscape') === false)
            {
                $aversion = explode(' ',stristr($this->_agent,'rv:'));
                preg_match('/rv:[0-9].[0-9][a-b]?/i',$this->_agent,$aversion);
                $this->setVersion(str_replace('rv:','',$aversion[0]));
                $this->setBrowser(self::BROWSER_MOZILLA);
                return true;
            }
            else if (stripos($this->_agent,'mozilla') !== false && preg_match('/rv:[0-9]\.[0-9]/i',$this->_agent) && stripos($this->_agent,'netscape') === false)
            {
                $aversion = explode('',stristr($this->_agent,'rv:'));
                $this->setVersion(str_replace('rv:','',$aversion[0]));
                $this->setBrowser(self::BROWSER_MOZILLA);
                return true;
            }
            else if (stripos($this->_agent,'mozilla') !== false && preg_match('/mozilla\/([^ ]*)/i',$this->_agent,$matches) && stripos($this->_agent,'netscape') === false)
            {
                $this->setVersion($matches[1]);
                $this->setBrowser(self::BROWSER_MOZILLA);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Lynx or not (last updated 1.7)
         *
         * @return boolean True if the browser is Lynx otherwise false
         */
        protected function checkBrowserLynx()
        {

            if (stripos($this->_agent,'lynx') !== false)
            {
                $aresult  = explode('/',stristr($this->_agent,'Lynx'));
                $aversion = explode(' ',(isset($aresult[1]) ? $aresult[1] : ""));
                $this->setVersion($aversion[0]);
                $this->setBrowser(self::BROWSER_LYNX);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Amaya or not (last updated 1.7)
         *
         * @return boolean True if the browser is Amaya otherwise false
         */
        protected function checkBrowserAmaya()
        {

            if (stripos($this->_agent,'amaya') !== false)
            {
                $aresult  = explode('/',stristr($this->_agent,'Amaya'));
                $aversion = explode(' ',$aresult[1]);
                $this->setVersion($aversion[0]);
                $this->setBrowser(self::BROWSER_AMAYA);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Safari or not (last updated 1.7)
         *
         * @return boolean True if the browser is Safari otherwise false
         */
        protected function checkBrowserSafari()
        {

            if (stripos($this->_agent,'Safari') !== false && stripos($this->_agent,'iPhone') === false && stripos($this->_agent,'iPod') === false)
            {
                $aresult = explode('/',stristr($this->_agent,'Version'));
                if (isset($aresult[1]))
                {
                    $aversion = explode(' ',$aresult[1]);
                    $this->setVersion($aversion[0]);
                }
                else $this->setVersion(self::VERSION_UNKNOWN);
                $this->setBrowser(self::BROWSER_SAFARI);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is iPhone or not (last updated 1.7)
         *
         * @return boolean True if the browser is iPhone otherwise false
         */
        protected function checkBrowseriPhone()
        {

            if (stripos($this->_agent,'iPhone') !== false)
            {
                $aresult = explode('/',stristr($this->_agent,'Version'));
                if (isset($aresult[1]))
                {
                    $aversion = explode(' ',$aresult[1]);
                    $this->setVersion($aversion[0]);
                }
                else $this->setVersion(self::VERSION_UNKNOWN);
                $this->setMobile(true);
                $this->setBrowser(self::BROWSER_IPHONE);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is iPod or not (last updated 1.7)
         *
         * @return boolean True if the browser is iPod otherwise false
         */
        protected function checkBrowseriPad()
        {

            if (stripos($this->_agent,'iPad') !== false)
            {
                $aresult = explode('/',stristr($this->_agent,'Version'));
                if (isset($aresult[1]))
                {
                    $aversion = explode(' ',$aresult[1]);
                    $this->setVersion($aversion[0]);
                }
                else $this->setVersion(self::VERSION_UNKNOWN);
                $this->setMobile(true);
                $this->setBrowser(self::BROWSER_IPAD);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is iPod or not (last updated 1.7)
         *
         * @return boolean True if the browser is iPod otherwise false
         */
        protected function checkBrowseriPod()
        {

            if (stripos($this->_agent,'iPod') !== false)
            {
                $aresult = explode('/',stristr($this->_agent,'Version'));
                if (isset($aresult[1]))
                {
                    $aversion = explode(' ',$aresult[1]);
                    $this->setVersion($aversion[0]);
                }
                else $this->setVersion(self::VERSION_UNKNOWN);
                $this->setMobile(true);
                $this->setBrowser(self::BROWSER_IPOD);
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Android or not (last updated 1.7)
         *
         * @return boolean True if the browser is Android otherwise false
         */
        protected function checkBrowserAndroid()
        {

            if (stripos($this->_agent,'Android') !== false)
            {
                $aresult = explode(' ',stristr($this->_agent,'Android'));
                if (isset($aresult[1]))
                {
                    $aversion = explode(' ',$aresult[1]);
                    $this->setVersion($aversion[0]);
                }
                else $this->setVersion(self::VERSION_UNKNOWN);
                $this->setMobile(true);
                $this->setBrowser(self::BROWSER_ANDROID);
                return true;
            }
            return false;
        }

        /**
         * Determine the user's platform (last updated 1.7)
         */
        protected function checkPlatform()
        {

            if (stripos($this->_agent,'windows') !== false)
                $this->_platform = self::PLATFORM_WINDOWS;
            else if (stripos($this->_agent,'iPad') !== false)
                $this->_platform = self::PLATFORM_IPAD;
            else if (stripos($this->_agent,'iPod') !== false)
                $this->_platform = self::PLATFORM_IPOD;
            else if (stripos($this->_agent,'iPhone') !== false)
                $this->_platform = self::PLATFORM_IPHONE;
            elseif (stripos($this->_agent,'mac') !== false)
                $this->_platform = self::PLATFORM_APPLE;
            elseif (stripos($this->_agent,'android') !== false)
                $this->_platform = self::PLATFORM_ANDROID;
            elseif (stripos($this->_agent,'linux') !== false)
                $this->_platform = self::PLATFORM_LINUX;
            else if (stripos($this->_agent,'Nokia') !== false)
                $this->_platform = self::PLATFORM_NOKIA;
            else if (stripos($this->_agent,'BlackBerry') !== false)
                $this->_platform = self::PLATFORM_BLACKBERRY;
            elseif (stripos($this->_agent,'FreeBSD') !== false)
                $this->_platform = self::PLATFORM_FREEBSD;
            elseif (stripos($this->_agent,'OpenBSD') !== false)
                $this->_platform = self::PLATFORM_OPENBSD;
            elseif (stripos($this->_agent,'NetBSD') !== false)
                $this->_platform = self::PLATFORM_NETBSD;
            elseif (stripos($this->_agent,'OpenSolaris') !== false)
                $this->_platform = self::PLATFORM_OPENSOLARIS;
            elseif (stripos($this->_agent,'SunOS') !== false)
                $this->_platform = self::PLATFORM_SUNOS;
            elseif (stripos($this->_agent,'OS\/2') !== false)
                $this->_platform = self::PLATFORM_OS2;
            elseif (stripos($this->_agent,'BeOS') !== false)
                $this->_platform = self::PLATFORM_BEOS;
            elseif (stripos($this->_agent,'win') !== false)
                $this->_platform = self::PLATFORM_WINDOWS;
        }
    }
